48.—(1) A holder of a school bus licence shall display at the rear of the vehicle in respect of which the licence is granted the marking set out in the Fourth Schedule.
(2) This rule shall apply to a vehicle licensed as a school bus —
(a)
on or after 1st July 1982, from that date;
(b)
between 1st January 1977 and 30th June 1982, from 1st August 1982;
(c)
between 1st January 1973 and 31st December 1976, from 1st October 1982;
(d)
between 1st January 1970 and 31st December 1972, from 1st January 1983; or
(e)
before 1st January 1970, from 1st March 1983.
(3) Notwithstanding paragraph (2), this rule shall not apply to a vehicle licensed as a school bus which has been fitted with a marking in accordance with rule 79A of the Road Traffic (Motor Vehicles, Construction and Use) Rules (R 9).